how to make work imx8mp as usb3 peripheral with USB B connector

[Woon]

Hi,

I made a custom board based on imx8mp-evk board.

I don't have a plan to use USB host mode, so I removed PD circuits including PD ic, mux, power ic ...etc

to do this, I am trying to modify the device tree (esp. imx8mp-evk.dts),

but it still not working on USB peripheral. 

Could someone help me out?

[Woon · Accepted solution]

it was my fault.
I found some of miss-design from our cusmtom board.
after fixed, it works.